Engine.



W. BOX.'

ENGINE.

APPLICATION FILED SEPT. 4. 1915.

Patented Nov. 7, 19 16.

mvmrop ATTORNEYS BEST AVAILABLE COP WALTER BOX, 0F GEORGETOWN, TEXAS.

ENGINE.

Specification of Letters Patent.

Patented Nov. "7, 1916.

Application filed September 4, 1915. Serial No. 49,063.

1 '0 an w/tom it may concern:

Be it known that I, WALTER Box, a citizen of the United States, and a resident of Georgetown, in the county of Williamson and State of Texas, have invented a certain new and useful Improvement in Enginesmf which the following is a specification.

My invention relates to improvements in engines, and it consists in the combinations, constructions, and arrangements herein described and claimed.

An object of my invention is to provide an engine of the internal combustion type with a rotary valve disposed in the cylinder head, the movement of which affects the entrance of the explosive charge and permits the exhaust of the burnt gases.

A further object of my invention is to provide an engine having a rotary valveof the type described in which there is no danger of leakage of the compressed gases due to the use of an expansion ring carried by the body of the valve.

A further object of my invention is to provide'a novel form of rotary valve for use with an internal combustion engine.

Other objects and advantages will appear in the following specification, and the novel features of the invention will be particularl pointed out in the appended claim.

13%;, invention is illustrated in the accompanying drawing forming part of this application, in which- Figure 1 is a central sectional view through one of the cylinders of the engine- Fig. 2 is a perspective view of the body portion of the valve. Fig. 3 is a perspective view of the expansion ring. Fig. i is a diagrammatic view showing a common valve actuating shaft. Fig. 5 is a diagrammatic view showing the position of the valve during the intake stroke, Fig. 6 duringthe compression stroke, Fig. 7 duringthe explosive stroke, and Fig. 8 during the exhaust stroke.

4 In carrying out my invention, I make use of a cylinder 1 having a crank case 2 in which is disposed a crank shaft 3, the latter being connected by means of a pitman 4 with the piston 5. In Fig. 1 I have shown a cyl inder which is provided with a water jacket 6, but it will be understood that this invention is equally applicable to air-cooled engines. At 7 I'have shown a cylinder head which is held in position by means of bolts sion of the ring freely.

7. The head 7 is providedwith an inlet passage 8 and an exhaust passage 9 and with the usual spark plug 16. The head has a bore 11 arranged to receive a rotary valve like that shown at 12 in Fig. 2. This valve consists of a ring or wheel having a central portion 12 connected to the outer body portion 12 by radially extending spokes or similar members 12". The valve stem 13 extends through the head 7 and is provided at its top with a gear 14 which meshes with a worm 15 on a shaft 16. i

As will be seen from Fig. 2, there is an opening 17 in the ring or valve body 12. A slot or groove 18 which, it will be observed is wider than the opening 17,.is provided in the outer periphery of the ring, but this slot terminates short of the opening 17, thereby providing shoulders 19. A spring expansion ring '20 is arranged to enter the groove or slot 18, this. expansion ring being of such length as to permit the compresengine itself or from any suitable part of the crank shaft, not shown. The drive shaft 16 bears worms 15, each of the worms 15 engaging its respective gear .14: in the man ner shown in Fig. 1. The movement of the shaft 16 causes the rotation of the valve stems 13 of the valves 12 of each of the cylinders.

Referring now to Fig. 5, the valve 12 is shown with its opening 17 in registration with the intake port 8 with the valve revolving in the direction shown by the arrow. In Fig. 6 the position of the valve 12 is shown during the compression stroke, in Fig. 7 during the explosive stroke, while in Fig. 8 the position of the valve is shown as changed to the extent that the opening 17 now registers with the outlet port 9 which communicates with the exhaust manifold. It will be seen that the valve is rotated once for every two revolutions of the main crank shaft.

Ihe problem in devices of this kind has been to prevent the loss of pressure through the escapement of the gases past the rotary valve. In the present instance, howevenl ha ve succeeded in preventing this from ha pening. The expansion ring always tends to hug the interior of the bore of the head closely so as to prevent the leakage of the gas. It will be observed that the expansion ring is protected from the pressure which is'developed in the engine by the fact that it is virtually incased or housed by the valve body itself, so that even if high pressure is developed Within the cylinder, it will not result in a corresponding increase of friction of the ring on the cylinder.

The use of the valvesuc'h as that described obviates the necessity of complex valve actuating mechanism, thus reducing the expense'and the liability of the parts to get out of order.

In order to prevent the leakage of the gas past the shaft 13 in the cylinder head 7, I provide circumferential grooves 13 in the shaft 13 in which the carbon will deposit, so as to make a self-cleaning packing. Ob-

other suitable packing cylindrical body portion being provided on its periphery with a circumferential groove in alinement with said 0 ening, the ends of the groove terminating s ortcoi the opening on each side thereof, and a spring expansion ring disposed within the roove for free expansion and contraction tierein and arranged to cover and uncover said ports.

WALTER BOX. 

